In this activity, you will be asked to round numbers to the nearest 10, 100 or 1,000.

Rounding numbers means adjusting the digits (either up or down) to make rough calculations simpler.

**Rounding numbers to the nearest 10:**

If the **'ones' **digit of the number is **less than 5**, **round** the number **down.**

If the **'ones'** digit of the number is 5** or more**, **round** the number **up.**

**Question: round 32 to the nearest 10:**

**30 **<- - -**32** - - - - - - ->** 40**

It is closer to 30 so 32 rounds down to 30

**Rounding numbers to the nearest 100:**

This time, look at the tens digit, if it is less than 50, round down.

If the tens digit is 50 or more, round up.

**Question**: round 834 to the nearest 100.

**800** < - - - - **834** - - - - - - - - - - - - >**900**

It is closer to 800, so 834 rounded to the nearest 100 is **800.**

**Rounding numbers to the nearest 1,000:**

When rounding to the nearest 1,000, count in 1,000s either side of your number and choose the nearest.

**Question:** round 2,839 to the nearest 1,000

**2,000** <- - - - - - - - - - - - - - - -**2,839** - - - - >** 3,000**

It's closer to 3,000, so 2,839 rounded to the nearest 1,000 is 3,000.

That's a lot to remember so feel free to check back at this introduction at any point by clicking on the red help button that will appear on the screen when you start the questions.